GB740811A - Improvements in the heat-sealing of thermoplastic film - Google Patents

Improvements in the heat-sealing of thermoplastic film

Info

Publication number
GB740811A
GB740811A GB20341/52A GB2034152A GB740811A GB 740811 A GB740811 A GB 740811A GB 20341/52 A GB20341/52 A GB 20341/52A GB 2034152 A GB2034152 A GB 2034152A GB 740811 A GB740811 A GB 740811A
Authority
GB
United Kingdom
Prior art keywords
film
sealing
strip
heat
contact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB20341/52A
Inventor
William Elliott Frew Gates
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB20341/52A priority Critical patent/GB740811A/en
Publication of GB740811A publication Critical patent/GB740811A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents

Landscapes

  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

740,811. Seaming non-metallic sheet material. IMPERIAL CHEMICAL INDUSTRIES, Ltd. Aug. 12, 1953 [Aug. 13, 1952], No. 20341/52. Class 42 (1). [Also in Group XVII] In a process for forming transverse seams between two or more continuous, superimposed layers of thermoplastic film by passing them from a feed roller or rollers over a supporting plate or drum to a take-off roller or the like and bringing a heated seaming member, protected by a separating barrier, into contact with the film above the plate or drum and holding it there until the layers are seamed together across their width, at least one securing member is brought into contact with the film close to the seaming region, and on each side thereof, before the heat-sealing member is withdrawn from contact with the film, and is withdrawn from contact with the film after the heat-sealing member has been withdrawn, the seaming member or members being at a temperature below the heat-sealing temperature of the film. As shown, flattened tubular film 1 passes from a feed roller 2 to take-off rollers 3 over a supporting metal plate 4 surfaced with resilient silicone rubber 7. The feed of the film is interrupted at set intervals, and an electricallyheated metal sealing strip 5 and a securing member 6 are brought down simultaneously, under spring loading, to press the film against plate 4. The edge of strip 5 is coated with polytetrafluorethylene to form a separating barrier. Member 6 extends on each side of strip 5 across the width of the film and is preferably water-cooled. When a heat-seal has been formed, strip 5 and member 6 are raised successively and the film advanced for the next seal. In an alternative arrangement, plate 4 is replaced by a continuously revolving drum, surfaced with silicone rubber, around a part of whose circumference the film passes. The sealing and securing members are adapted to press the film on to the drum surface, to travel for a short distance with the drum to seal the film, to be raised in succession and to be returned to their initial positions for the next sealing cycle. For sealing polythene film, a sealing-strip temperature of 180‹ C. is used and the sealing and securirig members contact the film for 0.5 and 0.8 seconds respectively.
GB20341/52A 1952-08-13 1952-08-13 Improvements in the heat-sealing of thermoplastic film Expired GB740811A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB20341/52A GB740811A (en) 1952-08-13 1952-08-13 Improvements in the heat-sealing of thermoplastic film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20341/52A GB740811A (en) 1952-08-13 1952-08-13 Improvements in the heat-sealing of thermoplastic film

Publications (1)

Publication Number Publication Date
GB740811A true GB740811A (en) 1955-11-23

Family

ID=10144345

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20341/52A Expired GB740811A (en) 1952-08-13 1952-08-13 Improvements in the heat-sealing of thermoplastic film

Country Status (1)

Country Link
GB (1) GB740811A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153608A (en) * 1961-10-06 1964-10-20 Edwin E Messmer Machine for heat-treating superposed plies of plastic material
US3272674A (en) * 1962-05-28 1966-09-13 Union Carbide Corp Plastic film welding process and apparatus
US3334004A (en) * 1964-02-25 1967-08-01 Union Carbide Corp Apparatus for cutting and radiant heat sealing thermoplastics
FR2629755A1 (en) * 1988-04-11 1989-10-13 Dowbrands Inc METHOD AND APPARATUS FOR CUTTING AND SOLDERING MULTIPLE PLATES OF THERMOPLASTIC MATERIAL HAVING TOUGH SECTIONS
US5094709A (en) * 1986-09-26 1992-03-10 General Electric Company Apparatus for packaging integrated circuit chips employing a polymer film overlay layer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153608A (en) * 1961-10-06 1964-10-20 Edwin E Messmer Machine for heat-treating superposed plies of plastic material
US3272674A (en) * 1962-05-28 1966-09-13 Union Carbide Corp Plastic film welding process and apparatus
US3334004A (en) * 1964-02-25 1967-08-01 Union Carbide Corp Apparatus for cutting and radiant heat sealing thermoplastics
US5094709A (en) * 1986-09-26 1992-03-10 General Electric Company Apparatus for packaging integrated circuit chips employing a polymer film overlay layer
FR2629755A1 (en) * 1988-04-11 1989-10-13 Dowbrands Inc METHOD AND APPARATUS FOR CUTTING AND SOLDERING MULTIPLE PLATES OF THERMOPLASTIC MATERIAL HAVING TOUGH SECTIONS

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